Compiler panic when computing array lengths

I found following examples that cause the compiler to panic:

Example 1: [compiler panic] Unhandled len type: *types.Array

package main

func a() *[1]byte {
	println("side effect")
	return nil
}

func main() {
	println(len(*a()))
}

Example 2: [compiler panic] interface conversion: interface is int64, not int.

Note that return value of a() is no longer dereferenced.

package main

func a() *[1]byte {
	println("side effect")
	return nil
}

func main() {
	println(len(a()))
}

I expect there are similar problems with cap().

No source files or tests are named in the issue. First reproduce both Go examples and inspect the compiler's handling of len for pointer-to-array values, then check the analogous cap path. Done means both examples compile without a panic and regression coverage verifies the expected behavior.